Golang cobra.Command类代码示例

func printOptions(w io.Writer, cmd *cobra.Command, name string) error {
	flags := cmd.NonInheritedFlags()
	flags.SetOutput(w)
	if flags.HasFlags() {
		if _, err := fmt.Fprintf(w, "### Options\n\n```\n"); err != nil {
			return err
		}
		flags.PrintDefaults()
		if _, err := fmt.Fprintf(w, "```\n\n"); err != nil {
			return err
		}
	}

	parentFlags := cmd.InheritedFlags()
	parentFlags.SetOutput(w)
	if parentFlags.HasFlags() {
		if _, err := fmt.Fprintf(w, "### Options inherited from parent commands\n\n```\n"); err != nil {
			return err
		}
		parentFlags.PrintDefaults()
		if _, err := fmt.Fprintf(w, "```\n\n"); err != nil {
			return err
		}
	}
	return nil
}

// GenManTree will generate a man page for this command and all decendants
// in the directory given. The header may be nil. This function may not work
// correctly if your command names have - in them. If you have `cmd` with two
// subcmds, `sub` and `sub-third`. And `sub` has a subcommand called `third`
// it is undefined which help output will be in the file `cmd-sub-third.1`.
func GenManTree(cmd *cobra.Command, header *GenManHeader, dir string) error {
	if header == nil {
		header = &GenManHeader{}
	}
	for _, c := range cmd.Commands() {
		if !c.IsAvailableCommand() || c.IsHelpCommand() {
			continue
		}
		if err := GenManTree(c, header, dir); err != nil {
			return err
		}
	}
	needToResetTitle := header.Title == ""

	basename := strings.Replace(cmd.CommandPath(), " ", "_", -1) + ".1"
	filename := filepath.Join(dir, basename)
	f, err := os.Create(filename)
	if err != nil {
		return err
	}
	defer f.Close()

	if err := GenMan(cmd, header, f); err != nil {
		return err
	}

	if needToResetTitle {
		header.Title = ""
	}
	return nil
}

func GenMarkdownTreeCustom(cmd *cobra.Command, dir string, filePrepender, linkHandler func(string) string) error {
	for _, c := range cmd.Commands() {
		if !c.IsAvailableCommand() || c.IsHelpCommand() {
			continue
		}
		if err := GenMarkdownTreeCustom(c, dir, filePrepender, linkHandler); err != nil {
			return err
		}
	}

	basename := strings.Replace(cmd.CommandPath(), " ", "_", -1) + ".md"
	filename := filepath.Join(dir, basename)
	f, err := os.Create(filename)
	if err != nil {
		return err
	}
	defer f.Close()

	if _, err := io.WriteString(f, filePrepender(filename)); err != nil {
		return err
	}
	if err := GenMarkdownCustom(cmd, f, linkHandler); err != nil {
		return err
	}
	return nil
}

// Test to see if we have a reason to print See Also information in docs
// Basically this is a test for a parent commend or a subcommand which is
// both not deprecated and not the autogenerated help command.
func hasSeeAlso(cmd *cobra.Command) bool {
	if cmd.HasParent() {
		return true
	}
	for _, c := range cmd.Commands() {
		if !c.IsAvailableCommand() || c.IsHelpCommand() {
			continue
		}
		return true
	}
	return false
}

func manPrintOptions(out io.Writer, command *cobra.Command) {
	flags := command.NonInheritedFlags()
	if flags.HasFlags() {
		fmt.Fprintf(out, "# OPTIONS\n")
		manPrintFlags(out, flags)
		fmt.Fprintf(out, "\n")
	}
	flags = command.InheritedFlags()
	if flags.HasFlags() {
		fmt.Fprintf(out, "# OPTIONS INHERITED FROM PARENT COMMANDS\n")
		manPrintFlags(out, flags)
		fmt.Fprintf(out, "\n")
	}
}

func genMan(cmd *cobra.Command, header *GenManHeader) []byte {
	// something like `rootcmd subcmd1 subcmd2`
	commandName := cmd.CommandPath()
	// something like `rootcmd-subcmd1-subcmd2`
	dashCommandName := strings.Replace(commandName, " ", "-", -1)

	fillHeader(header, commandName)

	buf := new(bytes.Buffer)

	short := cmd.Short
	long := cmd.Long
	if len(long) == 0 {
		long = short
	}

	manPreamble(buf, header, commandName, short, long)
	manPrintOptions(buf, cmd)
	if len(cmd.Example) > 0 {
		fmt.Fprintf(buf, "# EXAMPLE\n")
		fmt.Fprintf(buf, "```\n%s\n```\n", cmd.Example)
	}
	if hasSeeAlso(cmd) {
		fmt.Fprintf(buf, "# SEE ALSO\n")
		if cmd.HasParent() {
			parentPath := cmd.Parent().CommandPath()
			dashParentPath := strings.Replace(parentPath, " ", "-", -1)
			fmt.Fprintf(buf, "**%s(%s)**", dashParentPath, header.Section)
			cmd.VisitParents(func(c *cobra.Command) {
				if c.DisableAutoGenTag {
					cmd.DisableAutoGenTag = c.DisableAutoGenTag
				}
			})
		}
		children := cmd.Commands()
		sort.Sort(byName(children))
		for i, c := range children {
			if !c.IsAvailableCommand() || c.IsHelpCommand() {
				continue
			}
			if cmd.HasParent() || i > 0 {
				fmt.Fprintf(buf, ", ")
			}
			fmt.Fprintf(buf, "**%s-%s(%s)**", dashCommandName, c.Name(), header.Section)
		}
		fmt.Fprintf(buf, "\n")
	}
	if !cmd.DisableAutoGenTag {
		fmt.Fprintf(buf, "# HISTORY\n%s Auto generated by spf13/cobra\n", header.Date.Format("2-Jan-2006"))
	}
	return buf.Bytes()
}

func GenMarkdownCustom(cmd *cobra.Command, w io.Writer, linkHandler func(string) string) error {
	name := cmd.CommandPath()

	short := cmd.Short
	long := cmd.Long
	if len(long) == 0 {
		long = short
	}

	if _, err := fmt.Fprintf(w, "## %s\n\n", name); err != nil {
		return err
	}
	if _, err := fmt.Fprintf(w, "%s\n\n", short); err != nil {
		return err
	}
	if _, err := fmt.Fprintf(w, "### Synopsis\n\n"); err != nil {
		return err
	}
	if _, err := fmt.Fprintf(w, "\n%s\n\n", long); err != nil {
		return err
	}

	if cmd.Runnable() {
		if _, err := fmt.Fprintf(w, "```\n%s\n```\n\n", cmd.UseLine()); err != nil {
			return err
		}
	}

	if len(cmd.Example) > 0 {
		if _, err := fmt.Fprintf(w, "### Examples\n\n"); err != nil {
			return err
		}
		if _, err := fmt.Fprintf(w, "```\n%s\n```\n\n", cmd.Example); err != nil {
			return err
		}
	}

	if err := printOptions(w, cmd, name); err != nil {
		return err
	}
	if hasSeeAlso(cmd) {
		if _, err := fmt.Fprintf(w, "### SEE ALSO\n"); err != nil {
			return err
		}
		if cmd.HasParent() {
			parent := cmd.Parent()
			pname := parent.CommandPath()
			link := pname + ".md"
			link = strings.Replace(link, " ", "_", -1)
			if _, err := fmt.Fprintf(w, "* [%s](%s)\t - %s\n", pname, linkHandler(link), parent.Short); err != nil {
				return err
			}
			cmd.VisitParents(func(c *cobra.Command) {
				if c.DisableAutoGenTag {
					cmd.DisableAutoGenTag = c.DisableAutoGenTag
				}
			})
		}

		children := cmd.Commands()
		sort.Sort(byName(children))

		for _, child := range children {
			if !child.IsAvailableCommand() || child.IsHelpCommand() {
				continue
			}
			cname := name + " " + child.Name()
			link := cname + ".md"
			link = strings.Replace(link, " ", "_", -1)
			if _, err := fmt.Fprintf(w, "* [%s](%s)\t - %s\n", cname, linkHandler(link), child.Short); err != nil {
				return err
			}
		}
		if _, err := fmt.Fprintf(w, "\n"); err != nil {
			return err
		}
	}
	if !cmd.DisableAutoGenTag {
		if _, err := fmt.Fprintf(w, "###### Auto generated by spf13/cobra on %s\n", time.Now().Format("2-Jan-2006")); err != nil {
			return err
		}
	}
	return nil
}